Troubleshooting Scenario Questions

Using maps and collections to store query results and perform in-memory lookups instead of querying inside loops.

In-memory map lookups eliminate repetitive SOQL queries inside loops.

Writing queries that retrieve only the specific fields and records required using WHERE clauses.

Selective queries reduce data transfer and processing overhead.

Using relationship queries (parent-to-child or child-to-parent) to retrieve related data in a single query.

Relationship queries retrieve related parent and child records efficiently in one query.

Process records in smaller batch sizes and ensure parent records are sorted or processed in a deterministic order.

Smaller batch sizes reduce the window of record locks held simultaneously.

getId()

Correct. getId() returns the ID of the BatchApexWorker or job.

getApex龄JobId() / getJobId() / getAsyncApexJobId() - wait, getAsyncApexJobId() is valid.

Correct. getAsyncApexJobId() is a valid method on BatchableContext.

getJobId()

Correct. getJobId() returns the ID of the AsyncApexJob.

Utilize Custom Settings or Custom Metadata to provide a global toggle to turn off triggers dynamically.

Dynamic kill-switches allow administrators or developers to disable faulty or recursive triggers instantly.

Compare old and new field values using Trigger.oldMap and Trigger.newMap to check if relevant fields actually changed.

Checking if fields have changed prevents unnecessary executions when unrelated fields are updated.

Use a static boolean variable in a helper class set to false after the first execution.

Static variables persist for the duration of the request transaction and can block recursive trigger entries.

The entire test class fails to execute.

Setup is a prerequisite for the class.

Use a Debug Level configuration to define the verbosity for individual log categories.

Debug levels define the granularity of logs recorded per category.

Adjust log levels for specific categories such as Database, Workflow, and Apex Code.

Granular log category levels prevent capturing unnecessary verbose system logs.

Configure a Trace Flag specifying the targeted user and a designated start/end time.

Trace flags determine log levels and duration for specific users.

Create a shallow copy or clone of the wire data object in a getter or property assignment before mutation.

Correct because cloning the immutable wire object allows modification.

LWC reactivity is shallow, so nested object property mutations require creating a new object reference or using @track.

Correct because LWC tracks changes at the reference level for plain objects unless observed via @track.

Use a getter function that evaluates the wired property and returns the formatted result.

Correct. Getters can derive formatted values reactively from wired properties.

;Transform data within an Apex method before returning it to the wire service.

Correct. Preparing and formatting data directly in Apex before wire delivery is a valid and efficient pattern.

Use a wire adapter function (property-and-function syntax) to process data into a local reactive property.

Correct. Using a wire function allows processing data before assigning it to local component properties.

The constructor() is invoked before the component is inserted into the DOM.

Correct because the constructor initializes the component instance before DOM insertion.

connectedCallback() is invoked when the component is inserted into the DOM.

Correct because connectedCallback runs upon insertion into the DOM.

disconnectedCallback() is invoked when the component is removed from the DOM.

Correct because disconnectedCallback handles teardown when removed from the DOM.